Art of handling heavy oil residues



25 amounting to from i Patents Jan. 192a OSCAR E. BRANSKY AND FRANCES M. ROGERS, F WRITING, INDIANA, ASSIGNOBS T0 STANDARD OIL COMPANY,'0F WHITING, INDIANA, CORPORATION- OF INDA;

Aim: or No Drawing.

sulting when such an oil, for example, of the l character of mid-continent crude oil, is'reduced to a bot-tom or residue of high flash and fire test, the distillation being'conducted 1o eithe? with steam or under vacuum, so that substantially no cracking takes place: The

process is particularly advantageous in connectionwith the residues .from asphalt hear-- ing crude oils amounting toper cent-or less of the original oil. A v -In accordance with the present invention,

the resid'ue'of the character described is treated with a verylight hydrocarbon oil I product, such as naphtha (boiling point range 190 to 330 F.) hexane or other'lightproduct having an end boiling point withln the gasoline boiling point range, and the mixture is then allowed to settle. Suitable proportions are, for example, 10 to parts of a residue 7 to 10 .per cent of the original oil and 70 to 90 parts of naphtha.

After settling for a suitable period, say 12 to r 24 hours, the solution of the residue and naphtha'is decanted from the settled asphaltines,

30 which, after removal of any naphtha they 'may contain, may be utilized in the manufacture of asphaltic pitches and the like. In-

stead of removing the asphaltines by settling, it is readily apparent that the solution of pitch in naphtha'may be subjected to cen-.

trifugal action, and the asphaltines thereby separated. I

The naphtha solution of the residue, after femovalof the asphaltines, may" be subjected 40 l to'atreatment with sulfuric acid, forexample,

of 66 B., this treatment being suitably carried out, for example, bytreatment of the r diluted oil with sulfuric acid, as described in the'prior application o'flirancis M. Rogers,

Serial No. 584,863, filed August as, 1922 The treatment is carried out'in accordance with the nature of the'final product desired, the subsequent treatment being varied with the same end inview. Thus, 'after treatme nt with sulfuric acid the diluted oil maybe filtered nuns HEAVY one RESIDUES.

Application filed January 18, 1923. Serial No. 613,550. 7 i

through fullers earth or'other clarifying materlal, or may be chilled'and settled for the removalof petrolatum, a very high flash point bright stockor cylinder stock beingthereby produced. 1

A material particularly suited for use in connection ,with the above process is, for example,'the residue of about 7 per cent produced from mid-continent crude oil by reduction by fire and steam and having a melting point of about 110 F. and a penetration of 77 (A. S. T. M. method). After removal of theasphaltines, in the manner described, thedilute oil remainin may be treated with from 1 to 1 pounds 0 66 B. sulfuric acid per gallon, the treatment being preferably -car-g ried out in two or three dumps with removal of, sludge after each dump.' The resulting sour .oil may be washed andrneutralized and subjected to filtration .for the removal of petrolatum, if desired. The residual product,

after removal of the naphtha, is found to have a flash point of above-500 F. The removal of naphtha is in all cases effected by the usual distillation procedure. V

eclaim:

1. The method 'of handling a crude oil residue obtained by distillation from asphalt' 'bearing oilsubstantially Without cracking which consists in substantially diluting'the' residue with a hydrocarbon oil having an end boiling poifit in the gasoline boiling point range, removing undissolved asphaltines and treating the remaining diluted oil with sulfuric acid.

2'. The method of handling crude oil" residue obtained by distillation from an as- 'phalt bearing-crude oil substantially without cracking which comprises the steps of substantially diluting the residue with a hydrocarbon oil having a boiling point in the gasoline boiling .point range, and removing undissolved asphaltines therefrom.

a'rhe method or handling crude 011 without cracking and representing not more than 10 per cent of the original'crudeoilresidue obtained by distillation substantially range, removing undissolved as phaltines from the resulting solution and subsequently removing the light h ydrocarbon oil.

A. The method of handling a crude oil '5," residueobtained by distillation substantially without tracking and representing not more than 10 per cent of the original crude oil,- which consists in substantially-diluting the I sequently separating the naphthajrom the treated oil.

. OSCAR BRA SKY.

FRANCIS ROGERS. 

